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FOC | Family List | FOC Vol. 13 | Melastomataceae

17. Sonerila Roxburgh, Fl. Ind. 1: 180. 1820.

蜂斗草属 feng dou cao shu

Herbs, shrublets, or shrubs, branched. Stems usually 4-sided, winged or not, usually pubescent with simple or glandular trichomes. Petiole winged or not, usually pubescent; leaf blade thin, secondary veins 2-4(or 5) on each side of midvein, base usually cordate and often oblique, margin serrulate with each tooth having a terminal seta, apex acute or acuminate. Inflorescences terminal or sometimes axillary, scorpioid cymes or subumbellate, pedunculate; bracts small, caducous. Flowers small, 3[or 6]-merous. Hypanthium tubular-campanulate, 3-sided, 6-ribbed, pubescent. Calyx lobes broadly triangular, small, very short. Petals pink, red, or purplish red, oblong-elliptic. Stamens 3[or 6], equal or unequal; filaments filiform; anthers subulate to broadly ovate, dehiscence poricidal; connective not inflated. Ovary inferior, urceolate, apex with a membranous 3-lobed crown. Style filiform; stigma apiculate. Capsule campanulate to tubular-campanulate, crown woody and exserted from calyx; hypanthium 3[or 6]-sided, 6-ribbed, usually with sparse glandular trichomes. Seeds numerous, cuneate, small, glabrous or small tuberculate.

About 150 species: tropical Asia; six species (three endemic) in China.

Some 240 names have been published in this genus, and there may be as many as 150 species.

Sonerila khasiana C. B. Clarke (in J. D. Hooker, Fl. Brit. India 2: 539. 1879) probably occurs in SE Xizang (Mêdog), although it is not treated here.

1 Flower hypanthium and capsule tubular, hypanthium 4-5 × to 1.7 mm and capsule 4-7 × ca. 2 mm.   4 S. erecta
+ Flower hypanthium and capsule ± campanulate, broader in diam. than above relative to length   (2)
2 (1) Herbs to 7 cm tall, with a basal leaf rosette; leaf blade cordate, as long as wide.   5 S. primuloides
+ Herbs 10-50 cm tall, with leaves distributed along stems; leaf blades elliptic, ovate, or lanceolate, distinctly longer than wide (except sometimes in S. hainanensis)   (3)
3 (2) Leaf blade 1.5-3 × 1-2.3 cm.   6 S. hainanensis
+ Leaf blade usually much longer and wider than above   (4)
4 (3) Leaf blade base oblique or symmetrically deeply cordate, secondary veins usually (2-)4(or 5) on each side of midvein.   1 S. plagiocardia
+ Leaf blade base cuneate to obtuse, sometimes slightly oblique, but never deeply cordate, secondary veins 1 or 2(or 3) on each side of midvein   (5)
5 (4) Leaf blade abaxially scattered setose on veins, adaxially remotely setose between veins and sometimes with white, orbicular patches.   2 S. maculata
+ Leaf blade abaxially hispid on veins, adaxially sparsely appressed setose or strigose.   3 S. cantonensis

Lower Taxa


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